| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.lucene.queryparser.surround.query; |
| import java.io.IOException; |
| |
| /** |
| * Interface for queries that can be nested as subqueries |
| * into a span near. |
| */ |
| public interface DistanceSubQuery { |
| /** When distanceSubQueryNotAllowed() returns non null, the reason why the subquery |
| * is not allowed as a distance subquery is returned. |
| * <br>When distanceSubQueryNotAllowed() returns null addSpanNearQueries() can be used |
| * in the creation of the span near clause for the subquery. |
| */ |
| String distanceSubQueryNotAllowed(); |
| |
| void addSpanQueries(SpanNearClauseFactory sncf) throws IOException; |
| } |
| |